Installation ManualH3C S7500 Series Ethernet Switches Chapter 7 Software Maintenance7-19z An error occurs when the system boots with the primary file, so it boots with thebackup file.z An error occurs to both the primary and backup files, so the system choosesrandomly an application file for booting.z The system stops choosing any application file if it fails to boot with a randomapplication file. Then it supposes that the file system is unavailable or no correctboot file is available.Note:z If you specify only the primary file, but no backup file, the system boots with theprimary file. If the primary file is corrupted, the system randomly chooses anapplication file for booting.z If you specify only the backup file, but no primary file, the system boots with thebackup file.z If you specify neither the primary file nor the backup file, the system randomlychooses an application file for booting.7.6 Loading Host Software Containing the Boot ROM FileThe S7500 series support multiple types of boards and these boards use differentversions of Boot ROM. Thus, you are required to use the correct Boot ROM file whenupgrading the Boot ROM of a board. The upgrading will fail if the Boot ROM file doesnot match the board.To avoid the inconvenience caused by different Boot ROM files in upgrading, BootROM files are combined into a host software file. That is, you can use this combined filefor on-line upgrade of all boards.A Boot ROM file is named as “*.btm”, while a host software file containing Boot ROMfiles is named as “*.app”.7.6.1 Example of Upgrade Using Host Software Containing Boot ROM FilesI. Preset conditionsz The SRPU in slot 0 of the S7506 is LS81SPRG.z The LPU in slot 3 is LS81FT48A and the LPU in slot 4 is LS82GT20. There are noLPUs in the other slots.z The host software containing Boot ROM files is S7506.app.z Both online upgrading through command lines and upgrading through the Bootmenu use FTP.1) Download the host software containing Boot ROM files to the switch using FTP.
